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Long-term effects of biochar application on the growth and physiological characteristics of maize

文献类型： 外文期刊

作者： Cong, Mengfei 1 ; Hu, Yang 1 ; Sun, Xia 1 ; Yan, Han 1 ; Yu, Guangling 1 ; Tang, Guangmu 3 ; Chen, Shuhuang 3 ; Xu, Wanli 3 ; Jia, Hongtao 1 ;

作者机构： 1.Xinjiang Agr Univ, Coll Resources & Environm, Urumqi, Peoples R China

2.Xinjiang Agr Univ, Xinjiang Key Lab Soil & Plant Ecol Proc, Urumqi, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Soil & Fertilizer & Agr Sparing Water, Urumqi, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Saline Alkali Soil Improvement & Utilizat, Urumqi, Peoples R China

关键词： biochar; aeolian sandy soil; antioxidant enzymes; maize yield; long-term effect

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Biochar, as a soil conditioner, has been widely used to promote the growth of maize, but most of the current research is short-term experiments, which limits the research on the long-term effects of biochar, especially the physiological mechanism of biochar on maize growth in aeolian sandy soil is still unclear. Here, we set up two groups of pot experiments, respectively after the new biochar application and one-time biochar application seven years ago (CK: 0 t ha(-1), C1: 15.75 t ha(-1), C2: 31.50 t ha(-1), C3: 63.00 t ha(-1), C4: 126.00 t ha(-1)), and planted with maize. Subsequently, samples were collected at different periods to explore the effect of biochar on maize growth physiology and its after-effect. Results showed that the plant height, biomass, and yield of maize showed the highest rates of increase at the application rate of 31.50 t ha(-1) biochar, with 22.22% increase in biomass and 8.46% increase in yield compared with control under the new application treatment. Meanwhile, the plant height and biomass of maize increased gradually with the increase of biochar application under the one-time biochar application seven years ago treatment (increased by 4.13%-14.91% and 13.83%-58.39% compared with control). Interestingly, the changes in SPAD value (leaf greenness), soluble sugar and soluble protein contents in maize leaves corresponded with the trend of maize growth. Conversely, the changes of malondialdehyde (MDA), proline (PRO), catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) manifested an opposite trend to the growth of maize. In conclusion, 31.50 t ha(-1) biochar application can promote the growth of maize by inducing changes in its physiological and biochemical characteristics, but excessive biochar application rates ranging from 63.00-126.00 t ha(-1) inhibited the growth of maize. After seven years of field aging, the inhibitory effect of 63.00-126.00 t ha(-1) biochar amount on maize growth disappeared and changed to promoting effect.

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